Investor Deck · 2026 · Happy Sandboy
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Zettlein. The AI transaction layer between Brokher.com and Proassistly.
Where users land
Brokher.com
Public marketplace · already live
This product
Zettlein
AI transaction desk · building now
System of record
Proassistly
Backend engine · already built
A Happy Sandboy product. Cambodia-first, built for global scale. Use ← → to navigate.
01 · Problem
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A property deal touches 8+ intermediaries — none of them talk.
- ▸Broker, lawyer, valuer, banker, notary, insurer, mover, tax advisor — each a separate silo.
- ▸Buyers wait weeks between steps. Sellers lose deals to friction, not price.
- ▸Cross-border buyers get lost in jurisdiction, FX and title-status ambiguity.
- ▸Every party rebuilds context from scratch. No one owns the transaction.
"It's not the price. It's the process."
Real estate is the largest asset class on earth and the last one still coordinated by phone calls, PDFs and WhatsApp screenshots.
02 · Thesis
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Collapse the process into one AI-guided flow.
The consumer talks to a single, portable AI desk. It coordinates every professional in the background. A human licensed principal signs off on every binding action.
Rule 1
Brokher shows.
Rule 2
Zettlein talks & acts.
Rule 3
Proassistly owns truth.
03 · Market
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Cambodia is the perfect launch pad. The playbook scales.
$18B
Cambodia RE market
Annual transaction value
45%
Foreign-driven
Chinese, KR, US, EU buyers
3
Languages by default
KH · EN · ZH
0
Existing OS
No incumbent tech stack
Fragmented brokerage, weak title infrastructure, high cross-border demand, English-speaking developer talent. Win here → template for SE Asia, LatAm, MENA, Africa.
04 · Products
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Three products, one spine.
Layer 1
Brokher.com
Layer 2
Zettlein
Layer 3
Proassistly
05 · Zettlein
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A portable broker, lawyer, banker & notary in your pocket.
Same runtime, different personas. Every agent has a narrow scope, a specific toolset, and a dedicated licensed reviewer.
Broker
Matching · viewings · negotiation
Lawyer
Contracts · due diligence · jurisdiction
Banker
Financing · escrow · FX
Developer Liaison
New builds · inventory
Service Coordinator
Photo · legal · movers · insurance
Notary
Signing · stamping · cadastre
Landlord
Rent · deposits · tenants
Investor
Yield · portfolio · exits
Compliance
KYC / AML · sanctions · audit
06 · Trust model
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Every binding action is approved by a licensed human.
T0
Autonomous
T1
Human-reviewed
T2
Signed by principal
The AI can act at machine speed on T0. It drafts and proposes on T1/T2. Nothing legally binding ever ships without a real professional's signature.
07 · Integration
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How the three systems talk.
┌──────────── Brokher.com (SSR + SEO) ────────────┐
│ read-model API + <Zettlein /> embed │
└──────▲───────────────────────▲──────────────────┘
│ read │ chat + tool-calls
│ │
┌──────┴─────── Zettlein ──────┴──────────────────┐
│ agents · RAG · guardrails · HITL queue │
└──────────────────▲──────────────────────────────┘
│ authenticated /rpc/v1 (mTLS + JWT)
▼
┌───────────── Proassistly (source of truth) ─────┐
│ Identity · Property · CRM · Contracts · $$$ │
│ Media · Workflows · Events · Audit │
└──────────────────┬──────────────────────────────┘
│ domain events
▼
read-model · RAG index · search08 · Orchestration
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The user never loses context.
Signed Context Envelope
- ▸sub · tenant · locale · intent
- ▸subject_ref · signals · consent
- ▸resume_token (survives device, network, tab)
Identity Ladder
- ▸anon → known → verified → KYC'd
- ▸Same thread. Same token. Upgraded in place.
- ▸State on server, not tab. Resumable across devices.
09 · AI capture
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A phone becomes a listing factory.
Zettlein's capture pipeline turns a walkthrough into a full listing in under 10 minutes.
Guide
Capture
Segment
Floor plan
Enhance
Publish
On-device guidance · CV room segmentation · floor-plan synthesis · photo enhance · video tour · QA gate · one-tap publish via Proassistly RPC.
10 · Banking
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An escrow ledger, not a wallet.
Ledger
Double-entry
Rails
Multi-partner
Custody
Licensed partner
11 · Legal
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Contracts assemble themselves from jurisdiction packs.
- ▸Template DSL: clauses, variables, conditions per jurisdiction.
- ▸Cambodia pack: hard/soft title, strata, foreign-ownership rules.
- ▸Bilingual (KH/EN, KH/ZH) — legally binding version defined per clause.
- ▸Every generated contract carries a hash + template version in the audit log.
Compounding moat
One jurisdiction = one pack.
Every new country becomes a config file, not a rewrite. Licensed lawyers own each pack; the engine handles execution.
12 · Ecosystem
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Any product, for the stage you're in.
Not a directory. Zettlein routes by consumer stage — furniture, mortgage, insurance, movers, lawyer, art — surfaced the moment it becomes relevant.
Browsing
Guides · calcs
Viewing
Legal · valuation
Offer
Lawyer · escrow
Pre-move
Renovation · clean
Move-in
Furniture · internet
Owning
Insurance · mgmt
Revenue share is native — every payout splits at ledger time.
13 · Cold-start moat
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Bank foreclosures — an inventory monopoly.
- ▸Partner bank considering listing its full foreclosure book on Brokher.
- ▸High-motivation sellers, structured data, one institutional counterparty.
- ▸Zettlein foreclosure mode with strict legal guardrails.
- ▸Fee model: success fee per closed deal, lead fee per qualified buyer.
"One deal in the bank pipeline is worth 100 organic listings."
Solves cold-start. Anchors credibility. Creates day-one revenue.
14 · Journeys
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From browsing to funds transferred.
Seller
Register → scan → AI listing → offers → contract → payout
Buyer
Discover → advise → tour → finance → offer → close
Investor
Yield model → portfolio → exit orchestration
Partner
KYC → catalog → auto-routed leads → revenue share
One transaction spine. Different lenses per persona.
15 · Roadmap
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Phase 1 → 3.
Phase 1 · 0-6 mo
Cambodia MVP
Phase 2 · 6-18 mo
Regional
Phase 3 · 18-36 mo
Global template
16 · Build cost
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What Phase 1 costs.
12 wk
Calendar time
Founder + developer + Claude
~450h
Engineering
380–520 hour range
$30–75k
MVP out-of-pocket
Eng + legal + licensing
30-50%
Claude speed-up
On boilerplate + schemas
Critical risks are banking API paperwork (ABA), legal template review, and license-holder recruitment — not engineering.
17 · Ask
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We're building the last real estate platform you'll ever need.
What we need
- ▸Seed capital to deliver Phase 1 MVP + first 10 pilot deals.
- ▸Introductions to banks in Cambodia + SE Asia.
- ▸Cambodian licensed brokers + lawyers as founding principals.
"Brokher shows. Zettlein talks. Proassistly owns the truth."